Ship-Pumps.— Steam-Boats. 233 



the New World shall in after ages inspire in its citizens feelings 

 of gratitude towards the discoverer, the names of Chichester and 

 Pearson shciuld not be altogether forgot. 

 ]Sl!.rch8. Kn7. " Play-fair. 



pVhile on this subject, we may add one other fact, a recent 

 occurrence, which will probably fill no unimportant place in the 

 history of Vaccination : — In the electorate of Hesse a decree has 

 just been promulgated, by which every father of a family is de- 

 clared liable to a fine for each of his children who shall have at- 

 tained the age of one vear without being vaccinated. The fine is 

 to be from one to eight crowns for the first year ; and to aug- 

 ment progressively with the age of the child not vaccinated.] 



SHIP PUMPS, 



The following simple and ingenious method of vvorking a ship's 

 pumps, when the crew are either too few in mim.ber, or too much 

 exhausted to attend to that duty when its jjerformauce is most 

 necessary, namely, in a heavy gale, was put in practice with great 

 success by Captain Leslie of the ship George and Susan, on a late 

 voyage from Stockholm to North America. He fixed a spar aloft, 

 one end of which was ten or twelve feet above the top of his 

 pumps, and the other projected over the stern. To each end he 

 affixed a block or pulley. He then fastened a rope to the spears 

 of the pump ; and, after passing it through both puilej-s along 

 the spar, dropped it into the sea astern. To the rope he fastened 

 a cask of 110 gallons measurement, and containing 60 or 70 gal- 

 lons of water. This cask answered as a balance weight ; and 

 every motion of the ship from the roll of the sea made the ma- 

 chinery work. When the stem of the ship descended, or when 

 a sea or any agitation of the water raised the cask, the pump 

 spears descended ; and the contrary motions of the ship raised 

 the spears when the water flowed out. The ship was cleared in 

 this way in four hours ; and the crew, of course, were greatly 

 relieved. 



STEAM-BOATS. 



Mr.W. K. Northall, F.A.S., of Salop- House, Wolverhampton, 

 atmounces that he has discovered a method of propelling boats 

 by steam in a manner superior to every thing tliat has yet ap- 

 peared. The velocity of the boat may by this plan be easily 

 increased from three to seven miles an hour. The weight of 

 the machinery will not be more than three tons ; the space it 

 will occupy is comparatively small. An experiment was made 

 on Tliursday the 20th of March, with a model of a boat and 

 the appropriate machinery, in tlie presence of a number of 

 competent judges, and the result is said to have been most sa- 

 tisfactory. 



A CAUTION. 



